Problem:
Is |x - y| > |x + y| ?
1. x^2 - y^2 = 9
2. x - y = 2
I got the question right when I answered the question but I want to make sure I undestood the explanation as well - for some reason I am stuck on this.![]()
Is |x - y| > |x + y| ?
1. x^2 - y^2 = 9
2. x - y = 2
[Reveal] Spoiler:
The solution is C. In the solution explanation it says
"from S1 and S2 it follows that 2(x + y) = 9 from where (x + y) = 4.5."
So my question is:
How do you go from:
S1 and S2 (x^2 - x^y = 9 and x - y = 2)
to:
2(x + y) = 9
"from S1 and S2 it follows that 2(x + y) = 9 from where (x + y) = 4.5."
So my question is:
How do you go from:
S1 and S2 (x^2 - x^y = 9 and x - y = 2)
to:
2(x + y) = 9
I got the question right when I answered the question but I want to make sure I undestood the explanation as well - for some reason I am stuck on this.